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  1. I

    Chemistry MCQ thread...

    He says 1 and 2 are right HPO4 is formed when PO4 ion accept H+ from acid PO4 ion is used up, so that means the position of first equilibrium will shift to RHS
  2. I

    Chemistry MCQ thread...

    Oh sorry! my bad! I think it should be B too! does the ms say only 1 is correct?
  3. I

    Chemistry MCQ thread...

    I think you've discussed this enough with Zishi.. Well delta H = bonds broken - bonds formed bonds broken : c-c in graphite (let it be x) bonds formed : c-c in diamond (let it be y) x-y = +3 so x is greater than y
  4. I

    Chemistry MCQ thread...

    6. You may use p1v1 = p2v2 But I use ratio to solve this qu.. I think it may confuse u 10. It's B cuz there are 2 reagents and 2 products So there will be same units on the bottom and the top when calculating Kc It can't be A because C(s) is solid, and is ignored when calculating Kc 12. It...
  5. I

    Chemistry MCQ thread...

    12 has be to A.. n yea 21 is C. I'll explain the rest wait
  6. I

    Chemistry MCQ thread...

    lol i was trying to answer in ur thread n u deleted Plz confrm first since i did them very roughly 6. A 10.B 12.A 17.D 18.B 21.B 25.A 31. 2 n 3 32. 1 Only 40. 1 n 2
  7. I

    chanllenging mcqs

    Oh! I get it. I never used mole instead of conc before.. must beware thanks :fool:
  8. I

    plz guys read this its about chem !

    I checked the syllabus too and it shows p2 is out of 60 marks -_-
  9. I

    Opinion on AS chemistry

    Hi chemists, I'd like to ask what u guys think about the difficulty of AS chemistry. To begin with my opinion, I think AS chem is way harder than the other two sciences (especially physics is rather similar with IG) Of course, it being hard doesn't mean u won't get 50+ in paper2 and 35+ in...
  10. I

    Chemistry MCQ thread...

    Oh! Thanks. That's why we don't ignore it when H2O is a product cuz it's not in excess.
  11. I

    Chemistry MCQ thread...

    well then why in all other examples in textbooks etc, they consider H2O as well? are they contaminated water or sth lol..
  12. I

    Chemistry MCQ thread...

    just press 'print screen' and then open ur paint and 'ctrl + v' then crop ur image using dotty rectangle and then save the cropped part as a new image change the extension (bit) to sth else like jpg or jpeg this is how i do n it's damn simple if u do several times
  13. I

    Chemistry MCQ thread...

    Hey guys. This is the question uploaded by hassam some time ago. I think u implied that the answer is C I get it solid is not taken into account when getting Kc But why is water ignored? In all other examples, water is taken into account. And I did so in p22 as well. Help?
  14. I

    chanllenging mcqs

    0.313. C
  15. I

    Chemistry MCQ thread...

    Now can anyone answer my second question (electrolysis) on previous page please?
  16. I

    Chemistry MCQ thread...

    I got confused because u didn't upload the screenshot Whether the equation is reversible or not should be clear. If OCL–(aq) + uv light → Cl–(aq)+ ½O2(g) is not reversible, then any change in conc. of Cl- or O2 would have no effect in equilibrium position of the first equation
  17. I

    Chemistry MCQ thread...

    Oh, ok. If u acidify the pool, the equlibrium would shift to RHS to make more OH- so conc. of HOCl would be high
  18. I

    Chemistry MCQ thread...

    Cool thanks.
  19. I

    Chemistry MCQ thread...

    One more question Ans with explanation plz
  20. I

    Chemistry MCQ thread...

    Answer with explanation please? A classic experiment question.
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